ImportError when loading Open3D module into Blender python console
After several attempts, I found a solution. In order to fix the ImportError, install Open3D v0.4.0.0:

pip3 install open3d-python==0.4.0.0


Note that the package name has changed: use open3d-python instead of open3d. Probably, the latest versions of Open3D have some bugs (see also this Open3D issue).